DVDROM驅動不能載入的問題

 今天卸載Intervedio WinDVD後，突然發現DVD光碟機在系統中找不到了。Device manager中Device status是：

Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)

開始試圖更新光碟機驅動程式，總是說系統已經安裝最新的驅動（這是事實，因為改動沒有破壞光碟機驅動）。那麼說應該是驅動上層的系統的問題了。到MS論壇上一看有N多的人遇到類似的問題，詳見：

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=857993&SiteID=1

其中有高手提供瞭解決辦法：

http://support.microsoft.com/kb/314060

原來可以通過修改註冊表來解決。試了用手動修改註冊表的方法2，簡單有效

Step 1: Start Registry Editor

Click Start, click Run, type regedit, and then click OK. Registry Editor starts.
Step 2: Delete the UpperFilters registry entry

1.	In Registry Editor, expand My Computer, and then expand HKEY_LOCAL_MACHINE.
2.	Expand SYSTEM, and then expand CurrentControlSet.
3.	Expand Control, and then expand Class.
4.	Under Class, click {4D36E965-E325-11CE-BFC1-08002BE10318}.
5.	In the right pane (topic area), click UpperFilters. Note An UpperFilters.bak registry entry may also appear. To delete the UpperFilters registry entry, you must click UpperFilters and not UpperFilters.bak.
6.	On the Edit menu, click Delete.
7.	When you receive the following message, click Yes to confirm the deletion of the UpperFilters registry entry:Are you sure you want to delete this value?

The UpperFilters registry entry is removed from the {4D36E965-E325-11CE-BFC1-08002BE10318} registry subkey.

Note Do not exit Registry Editor. You must have this program for the next step.
Step 3: Delete the LowerFilters registry entry

1.	In Registry Editor, expand My Computer, and then expand HKEY_LOCAL_MACHINE.
2.	Expand SYSTEM, and then expand CurrentControlSet.
3.	Expand Control, and then expand Class.
4.	Under Class, click {4D36E965-E325-11CE-BFC1-08002BE10318}.
5.	In the right pane (topic area), click LowerFilters. Note An LowerFilters.bak registry entry may also appear. To delete the LowerFilters registry entry, you must click LowerFilters and not LowerFilters.bak.
6.	On the Edit menu, click Delete.
7.	When you receive the following message, click Yes to confirm the deletion of the LowerFilters registry entry:Are you sure you want to delete this value? The LowerFilters registry entry is removed from the {4D36E965-E325-11CE-BFC1-08002BE10318} registry subkey.
8.	Exit Registry Editor.

Step 4: Restart the computer

If a CD recording program no longer works after you restart the computer, you must reinstall the CD recording program.